Cup-head or piston-packing



M 1. 7 (N0 ode Li PRUDEN.

0UP HEAD 0R PISTON PAGKING.

N0. 539,085. Patented Maym, 1895 WWW 2/5571 I 4 I Tu: annals PETERS m.Pucmu'pea, WASHINGTON. 04 c.

UNITED STATES- PATENT OF CE.

JOHN F. PRUDEN, OF OAKDALE STATION, PENNSYLVANIA.

CUP-HEAD OR PISTON-PACKING.

PECIFIGATION forming part of Letters Patent No. 539,085, dated May 14,1895.

Application filed February 13, 1895- Serial No. 538,294- (No model.) I

To aZZ whom it may concern.-

Be it known that I, JOHN F. PRUDEN, a citizen of the United States,residing at Oakdale Station, in the county of Allegheny, State ofPennsylvania,have invented certain new and useful Improvements inCup-Heads or Piston- Packing, of which the following is a specification,reference being had therein to the accompanying drawings.

This invention relates to certain new and useful improvements incup-heads or pistonpacking for any and all forms of pumps and the likewhere such device is employed. It is designed more particularly as animprovement upon the c nstruction disclosed in the Patent No. 526,053,granted to me September 18, 1894, and has for its objects among othersto simpilfy the construction and reduce the number of parts and yet atthe same time accomplish equally as good results. I dispense with theadjusting screws employed in the former construction, making the taperedsleeve in sections and providing each section with a lug or projection.Against the outer ends of these lugs or projection a plate bears, andthis plate is provided with a set screw by which the parts may be firmlybound together after the cap-piece is adjusted to compensate for wear.The tapered portions are provided with lugs which Work in grooves in theconical part of the body portion of the device.

Other objects and advantages of the invention will hereinafter appearand the novel features thereof will be specifically defined by theappended claims.

The invention is clearly illustrated in the accompanying drawings,which, with the letters of reference marked thereon, form a part of thisspecification, and in which- Figure 1 is a substantially centrallongitudinal section through my piston-head with a portion of the pistonrod shown in elevation and broken away. Fig. 2 is a cross-section of thesame on the line 2 2 of Fig. 1. Fig.3 is an end elevation. Fig. 4 is aview similar to Fig. 3 with the plate and its set-screw removed. Fig. 5is a perspective view of one of the sections of tapered the sleeve.

Like letters of reference indicate like parts throughout the severalviews.

Referring now to the details of the drawings by letter, A designates thebody portion which is conical in form with a central longitudinal borethrough which passes the piston rod A which is screw-threaded at its,end as shown at a. The larger end of this conical part has an annularenlargement a as seen best in Fig. 1, which is provided with a socket orannular recess a into which the smaller end of thesectional taperedsleeve may be forced as the latter is adjusted to throw the packingrings outward.

The inclined wall of the body portion A is formed withlongitudinally-disposed grooves A in which are located the lugsorprojections b on the inner faces of the tapered portions or wedges Bwhich are fitted over the conical part of the body portion, there beingin this instance three shown which consitnte atapered sleeve,the outerperiphery of which is embraced by a sleeve 0 which is split lengthwiseas shown at C, and this sleeve is embraced by the packing rings D ofsuitable construction, or they may be in the form of asingle strip woundspirally about the outer sleeve as indicated by dotted lines in Fig. 1.These packing rings are arranged with their peripheries extended beyondthe periphery of the body portion as shown and the innermost one bearsagainst the shoulder or face a of the enlargement a of the body portionAas seen in Fig. 1. Each of the sleeve sections B carries at its outerend a stud or pin B which works through openings d in the cap-piece Eagainst the inner face e of the annular flange of which the outermostpack-' ing rings finds a bearing as shown in Fig. 1. This cap-piece Ehas an inwardly-extending central boss E as seenin Fig.1, which entersbetween the outer ends of the sleeve-portions B' as shown ,inFig. 1,while an outwardlyextending boss E embraces the pistonrod A as is alsoseen in Fig. 1.

F is a plate having a threaded opening on gaging the threads of the bossE of the cappiece E, and G is a nut engaging the threaded end of thepiston rod and bearing against the outer end of the boss E of thecap-piece E a] as shown in Fig. 1.

H is a bolt having a thumb nut or milled head H by which it may beturned. This bolt is tapped through the flange of the plate F and bearsagainst the outer face of the cappiece E as shown in Fig. 1.

The parts are assembled as shown. The cap-piece is screwed up and thenthe nut G is tightened and the tapered sleeve-portions B are forcedinward and the packing rings outward and when the parts aresuifi'ciently adjusted the set screw H is turned to bind the plate andthe cap-piece E together and the parts are all held against displacementor movement upon each other.

Modifications in detail may be resorted to. without departing from thespirit of the invention or sacrificing any of its advantages.

What I claim as new is 1. The combination with the conical body portion,of the tapered separated sleeve sections, sleeved thereon the packingrings,surrounding said sections the cap-piecebearing on the packingrings the plate and the retaining nut, all substantially as specified.

2. The combination with the conical body portion having grooves, of thetapered sleeve portions surrounding said body portion and having lugsworking in said grooves, the annular packing, around the sleeve portionthe cap-piece the plate threaded on said cappiece, and the retainingnut, substantially as specified.

3. The combination with the conical body portion, of the tapered sleevesections, sur rounding the said body portion the annular packing, aroundsaid tapered section the split sleeve around said sections, the cap-piece bearing against the tapered sleevesection, the

plate bearing on cap-piece and the retaining nut, substantially asspecified.

4. The combination with the conical body portion, the tapered sleevesections surrounding the body portion and having projections or studs,and the annular packing, around the sleeve section of the cap-piece withopenings for said projections or studs, the plate bear ing against thetapered sleeve section and the retaining nut, as set forth.

5. The combination of the conical body portion, the tapered sleevesections, surrounding the body portion the annular packing, surroundingthe sleeve sections the cap-piece having threaded boss, the platescrewed on said boss, the retaining nut and the set screw carried by theplate and engaging the said cap-piece, substantialiy as and for thepurpose specified.

6. The combination of the conical body portion,ihavin g longitudinalgrooves,'the tapered sleeves surrounding the body portion and formedwith lugs fitted in said grooves, the split sleeve, the annular packing,surroundin g said sleeves, the cap-piece bearing against said sleeves,the plate, the retaining nut, and the set bolt in said plate and bearingon the said cap piece, substantially as shown and described.

In testimony whereof I afiix my signature in presence of two witnessesJOHN F. PRUDEN.

WVitnesses:

SAMUEL NEWTON, E. A. THOMPSON.

